GPS module

Stephen1988 · Mar 23, 2026

I have a typhoon h. Just received it this week. It’s got the common gps loss after take off. I’m thinking it might be the little battery. I’ll power it up outside for 30 mins to see will it recharge. I think it’s time to buy a multimeter

. My question is what gps modules are cross compatible between the typhoon h, h plus, h520 h3 and h520e. Can any or all be swapped over for testing purposes

Vaklin · Mar 23, 2026

They are different and not replaceable.
The problem is not in this module.
Probably a misalignment betwen the position, which is stored in the FC from the IMU and the current position, obtained from the GPS is the real problem.
Try to do calibration.

DoomMeister · Mar 23, 2026

Do the Accelerometer calibration on a flat level surface. You can then leave the aircraft powered on sitting out in the shade to avoid overheating for at least 12 minutes so GPS has a chance to do a full update of the ephemeris.

Once you get GPS Ready you should be good to go. At my Michigan home there are a lot of tall mature trees and GPS is kind of iffy. Once I get up above them GPS gets more stable.

Power off after getting GPS Ready then power up again right away. If it takes more than 90 seconds to get GPS Ready again then the battery on the GPS is likely weakened. The charging circuit is very slow charging and it may take leaving the aircraft powered on for an hour or two to get it charged enough to allow retention of the ephemeris.

Stephen1988 · Mar 23, 2026

DoomMeister said:
Do the Accelerometer calibration on a flat level surface. You can then leave the aircraft powered on sitting out in the shade to avoid overheating for at least 12 minutes so GPS has a chance to do a full update of the ephemeris.

Once you get GPS Ready you should be good to go. At my Michigan home there are a lot of tall mature trees and GPS is kind of iffy. Once I get up above them GPS gets more stable.

Power off after getting GPS Ready then power up again right away. If it takes more than 90 seconds to get GPS Ready again then the battery on the GPS is likely weakened. The charging circuit is very slow charging and it may take leaving the aircraft powered on for an hour or two to get it charged enough to allow retention of the ephemeris.

The issue has been resolved and the answer shows my stupidity. As I just received this unit I was a bit to hasty in wanting to just get out and test would it arm and take flight. I inserted one of the batteries that came with the unit, it showed 15v so I taught it was adequate for a quick take off and land. The batteries might not have been charged in years. All looked normal until take off but a few seconds after take off the voltage must have dropped to a critically low lever . I’m thinking this caused the gps to disable. Can this be confirmed?. After inserting a charged battery the drone all worked as it should